Every time my speed shows on a roadside radar speed indicator, the speed displayed on my speedometer is three MPH less than the radar shows it to be. Anyone seeing something similar?
I should have said the speed displayed on my speedometer is three MPH higher than the radar shows it to be.
Anyone seeing something similar?
It'll be more accurate when the tires are worn out
3mph at what speed? At 50mph that's 6% At 25 it would be 12%. A smaller tire size would help - and I'll bet your "standard" tires are not the same size AND brand as original
That changes things. Are the tires NEW, or worn? And it is not uncommon for speedos to read high. Helps keep you from getting as big a speeding ticket as you would otherwize get.
What you need to do is check the ODOMETER against a "measured mile". If it is accurate, check the speedo with a GPS.
Otherwize, like a said in the first reply.
I doubt that very few speedometers show the actual speed at all speeds. Three MPH may not be bad . My 2007 Tacoma 2 wheel drive is close to showing
5 miles faster than I am actually going at 55 MPH. I use my GPS to determin the speed. Those things are suspose to be accurate to less than 1 mph.
The tires have between 10,000 & 15,000 miles on them.
Just checked my PT Cruiser today against the GPS - reads 3kph high at
100 KPH, and .3km long per 10 km. Tires are half worn standard tires. With the oversize snows I run in the winter it's out 3 the other way.Have something to add? Share your thoughts — no account required.
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